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AnnotationValue—Wolfram Language Documentation

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• See Also
  • Annotate
  • AnnotationKeys
  • AnnotationDelete
  • AnnotationRules
  • Annotation
  • Graph
  • MeshRegion
  • BoundaryMeshRegion
  • Audio
  • CSGRegion
  • CurrentValue
• Related Guides
  • Graph Construction & Representation
  • Mesh-Based Geometric Regions
  • Graph Annotations
  • Annotations
  • Speech Computation

AnnotationValue[obj,key]

gives the annotation value associated with key for the object obj.

AnnotationValue[{obj,itemspec},key]

gives the annotation value associated with key for items specified by itemspec in obj.

• Typically used to extract and manipulate values in annotations associated to an object or an item in an object.
• AnnotationValue gives the value value in key->value annotations for an object and its items.
• Possible objects with items that can be annotated:
• Item specification itemspec for each type of object is given in its reference page.
• Missing is returned when a name requested in AnnotationValue is not found.
• AnnotationValue[{obj,itemspec},key] returns unevaluated for the tag key without value.
• AnnotationValue[…,key]=val can be used to modify the annotation value.

Generate a complete graph with annotations:

Retrieve the annotation value associated with an annotation name:

Change the annotation value:

Unset the annotation value:

Get intrinsic MeshCellMeasure annotations for cells in a mesh:

Automatically compute annotations for an Audio object:

Retrieve annotations for louder intervals:

Retrieve several properties from a vertex:

And from an edge:

Unset annotations for vertices:

And edges:

AnnotationValue works with undirected graphs:

Directed graphs:

Multigraphs graphs:

Mixed graphs:

Weighted graphs:

Standard edge annotations include EdgeStyle:

EdgeLabels:

EdgeShapeFunction:

Non-visual annotations include EdgeWeight:

Set a custom annotation:

Set an annotation value for the edge 12:

Retrieve the annotation value for the edge 12:

Retrieve an annotation from a CSGRegion:

Modify an annotation:

Remove an annotation:

Use Do to set several annotation values:

Or different annotation values for different items:

Use Table to build a list of annotation values:

Create a weighted graph:

Set edge weights:

Compute weight scale:

Set the edge thickness to reflect the edge weight:

Highlight a path and mark the start point and endpoint:

Select vertices along a path:

Highlight by setting edge style along the path and vertex labels for start point and endpoint:

Dynamically highlight the edges in the order given by EdgeList:

Do five updates a second:

Dynamically visualize breadth-first search:

Use Annotation as a wrapper to specify annotations in functions such as Graph:

AnnotationValue returns $Failed for undefined annotations:

Use AnnotationKeys to test for the presence of an annotation:

Generate a list of vertex label rules:

Use Annotate to set an annotation without changing the original:

The original graph is unchanged:

Use AnnotationDelete to remove an annotation without changing the original:

The original graph is unchanged:

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